Multi-sprue hot nozzle

Abstract

The utility model discloses a multi-sprue hot nozzle. The multi-sprue hot nozzle comprises a hot nozzle body, a plurality of nozzles and a heating wire, the hot nozzle body is in a flat cuboid shape. The nozzles are sequentially arranged at one end of the hot nozzle body, a hot nozzle inlet is formed in the other end of the hot nozzle body, a plurality of hot runners are formed in the hot nozzle body, one ends of the hot runners are communicated with feeding ports of the nozzles respectively, and the other ends of the hot runners are communicated with the hot nozzle inlet. And the heating wire is wound on the hot nozzle body for multiple circles. According to the multi-sprue hot nozzle disclosed by the utility model, a plurality of hot runners are arranged in the hot nozzle body, so that a plurality of circles of heating wires wound on the hot nozzle body can heat materials flowing through the plurality of hot runners at the same time, and compared with the condition that each hot runner needs to be provided with a set of heating system, the multi-sprue hot nozzle not only reduces the production cost, but also improves the production efficiency during injection molding of a multi-cavity product. And the time required for arranging the nozzles is saved, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, and specifically, to a multi-gate hot nozzle. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. In order to avoid the generation of gate waste during the injection molding process, a hot runner system is usually adopted in the related art. The existing hot runner system usually has a set of heating systems for each hot runner. However, this not only increases the production cost, but also requires a lot of time to arrange the nozzles of the hot runner system when injecting multi-cavity products, resulting in a decrease in production efficiency.

[0003] Therefore, the prior art needs to be improved and developed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multi-gate hot nozzle, which can not only reduce the production cost, but also improve the production efficiency when used for injecting multi-cavity products.

[0005] A multi-gate hot nozzle provided by the utility model includes: a hot nozzle body, a plurality of nozzles and heating wires; the hot nozzle body is in the shape of a flat cuboid; the plurality of nozzles are sequentially arranged at one end of the hot nozzle body, a hot nozzle inlet is arranged at the other end of the hot nozzle body, a plurality of hot runners are formed in the hot nozzle body, one ends of the plurality of hot runners are respectively communicated with the feed ports of the plurality of nozzles, and the other ends of the plurality of hot runners are all communicated with the hot nozzle inlet; the heating wires are wound around the hot nozzle body for multiple turns.

[0006] According to an embodiment of the utility model, the above-mentioned hot nozzle body has a feed section, a material conveying section and a discharge section, and the feed section, the material conveying section and the discharge section are all wound with multiple turns of the heating wires. The distance between two adjacent turns of the heating wires in the multiple turns of the heating wires on the feed section is a first distance, the distance between two adjacent turns of the heating wires in the multiple turns of the heating wires on the discharge section is a second distance, the distance between two adjacent turns of the heating wires in the multiple turns of the heating wires on the material conveying section is a third distance, and both the first distance and the second distance are less than the third distance.

[0007] According to an embodiment of the utility model, an installation hole communicated with the hot runner is arranged at one end of the above-mentioned hot nozzle body, and one end of the nozzle extends into the installation hole to be connected with the hot nozzle body.

[0008] According to an embodiment of the present utility model, each of the above-mentioned nozzles includes a nozzle body and a fixing sleeve; one end of the nozzle body extends into the mounting hole and abuts against the bottom of the mounting hole, so that the feed port of the nozzle body communicates with the hot runner; a fixing seat is provided on the outer side wall of one end of the nozzle body, the fixing sleeve is sleeved on the other end of the nozzle body, one end of the fixing sleeve abuts against one end of the fixing seat away from the bottom of the mounting hole, and the outer side wall of the fixing sleeve is connected to the side wall of the mounting hole.

[0009] According to an embodiment of the present utility model, the feed port of the above-mentioned nozzle body includes a straight section and a tapered section. The diameter of the straight section is the same as the diameter of the hot runner, and the diameter of the tapered section gradually decreases from the size same as the diameter of the straight section to the size same as the diameter of the discharge port of the nozzle body along the material flow direction.

[0010] According to an embodiment of the present utility model, the discharge port of each of the above-mentioned nozzle bodies has a plurality of outflow channels, and the plurality of outflow channels are evenly distributed.

[0011] According to an embodiment of the present utility model, an installation groove adapted to the shape of the heating wire is provided on the outer side wall of the above-mentioned hot nozzle body, and the heating wire is located in the installation groove.

[0012] According to an embodiment of the present utility model, an annular sealing groove is provided on the end face of the other end of the above-mentioned hot nozzle body, and the annular sealing groove surrounds the hot nozzle inlet.

[0013] According to an embodiment of the present utility model, a mounting seat is provided on the outer side wall of the other end of the above-mentioned hot nozzle body, and a hoisting hole is provided on one side of the mounting seat away from the nozzle.

[0014] According to an embodiment of the present utility model, the number of the above-mentioned hot nozzle inlets is two, and each hot nozzle inlet communicates with four of the above-mentioned hot runners.

[0015] The beneficial effects of the present utility model are as follows: The multi-gate hot nozzle of the present utility model is provided with a plurality of hot runners in the hot nozzle body, so that the multi-turn heating wires wound around the hot nozzle body can simultaneously heat the materials flowing through the plurality of hot runners. Compared with the situation where each hot runner needs to be equipped with a set of heating system, not only the production cost is reduced, but also when injecting multi-cavity products, the time required for arranging the nozzles is saved, thereby improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0017] Figure 1 Schematic diagram of the structure of the multi-gate hot nozzle in the embodiment of the present utility model;

[0018] Figure 2 Cross-sectional view of the multi-gate hot nozzle in the embodiment of the present utility model;

[0019] Figure 3 Side view of the multi-gate hot nozzle in the embodiment of the present utility model;

[0020] Figure 4 is Figure 2 Partial enlarged view of position A of

[0021] Explanation of reference numerals:

[0022] 1. Hot nozzle body; 11. Hot nozzle inlet; 12. Hot runner; 13. Mounting hole; 14. Annular sealing groove; 15. Mounting seat; 151. Lifting hole; 101. Feeding section; 102. Material conveying section; 103. Discharging section; a. First distance; b. Second distance; c. Third distance; 2. Nozzle; 21. Nozzle body; 211. Fixed seat; 212. Straight section; 213. Gradual change section; 22. Fixed sleeve; 23. Outflow channel; 3. Heating wire. Detailed implementation manners

[0023] The following will disclose multiple implementation manners of the present utility model with diagrams. For the sake of clarity, many practical details will be described together in the following narration. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some implementation manners of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in the diagrams in a simple schematic manner.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0025] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] To further understand the content, features, and effects of the present utility model, the following embodiments are exemplified and described in detail with reference to the accompanying drawings as follows:

[0027] As Figure 1 、 Figure 2 and Figure 3 shown, the present utility model provides a multi-gate hot nozzle, which includes a hot nozzle body 1, a plurality of nozzles 2, and a heating wire 3. The hot nozzle body 1 is in the shape of a flat cuboid. The plurality of nozzles 2 are sequentially arranged at one end of the hot nozzle body 1, and a hot nozzle inlet 11 is provided at the other end of the hot nozzle body 1. A plurality of hot runners 12 are formed in the hot nozzle body 1. One ends of the plurality of hot runners 12 are respectively communicated with the feed ports of the plurality of nozzles 2, and the other ends of the plurality of hot runners 12 are all communicated with the hot nozzle inlet 11. The heating wire 3 is wound around the hot nozzle body 1 for multiple turns.

[0028] In specific applications, the other end of the hot nozzle body 1 is installed on an injection molding machine, the hot nozzle inlet 11 is communicated with the material outlet of the injection molding machine, and the material is injected from the injection molding machine and sequentially passes through the hot nozzle inlet 11, the plurality of hot runners 12, and the plurality of nozzles 2 and is injected into the mold. When the material passes through the hot nozzle inlet 11, the plurality of hot runners 12, and the plurality of nozzles 2, the heating wire 3 heats the hot nozzle body 1 to keep the material passing through the hot nozzle inlet 11, the plurality of hot runners 12, and the plurality of nozzles 2 in a molten state.

[0029] In practical applications, the number of hot nozzle inlets 11 provided at the other end of the hot nozzle body 1 is two, and each hot nozzle inlet 11 is communicated with four hot runners 12. Specifically, the four hot runners 12 are evenly arranged, and the projections of the four hot runners 12 along their axial directions surround the corresponding hot nozzle inlet 11.

[0030] As Figure 2As shown, in some preferred embodiments, the above-mentioned hot nozzle body 1 has a feeding section 101, a material conveying section 102 and a discharging section 103. Multiple turns of heating wires 3 are wound around the feeding section 101, the material conveying section 102 and the discharging section 103. The distance between two adjacent turns of the heating wires 3 on the multiple turns of heating wires 3 on the feeding section 101 is the first distance a, the distance between two adjacent turns of the heating wires 3 on the multiple turns of heating wires 3 on the discharging section 103 is the second distance b, and the distance between two adjacent turns of the heating wires 3 on the multiple turns of heating wires 3 on the material conveying section 102 is the third distance c. Both the first distance a and the second distance b are smaller than the third distance c. Through this technical solution, the material can maintain a molten state when flowing through the hot nozzle body 1 and energy can be saved.

[0031] As Figure 2 shown, in some preferred embodiments, one end of the above-mentioned hot nozzle body 1 is provided with an installation hole 13 communicating with the hot runner 12, and one end of the nozzle 2 extends into the installation hole 13 to be connected with the hot nozzle body 1. By providing the installation hole 13 on the hot nozzle body 1, it is not only convenient for the connection between the nozzle 2 and the hot nozzle body 1, but also can avoid the situation that the material easily overflows from the connection between the nozzle 2 and the hot nozzle body 1.

[0032] As Figure 2 shown, in some preferred embodiments, each of the above-mentioned nozzles 2 includes a nozzle body 21 and a fixing sleeve 22. One end of the nozzle body 21 extends into the installation hole 13 and abuts against the bottom of the installation hole 13, so that the feeding port of the nozzle body 21 communicates with the hot runner 12. A fixing seat 211 is provided on the outer side wall of one end of the nozzle body 21. The fixing sleeve 22 is sleeved on the other end of the nozzle body 21. One end of the fixing sleeve 22 abuts against one end of the fixing seat 211 away from the bottom of the installation hole 13, and the outer side wall of the fixing sleeve 22 is connected to the side wall of the installation hole 13. Specifically, the outer side wall of the fixing sleeve 22 may be provided with an external thread, and the inner side wall of the installation hole 13 is provided with an internal thread. The external thread is screwed with the internal thread to realize the connection between the fixing sleeve 22 and the hot nozzle body 1. Through this technical solution, the nozzle 2 can be firmly fixed, and the situation that the nozzle 2 loosens due to excessive pressure can be avoided.

[0033] As Figure 4 shown, in some preferred embodiments, the feeding port of the above-mentioned nozzle body 21 includes a straight section 212 and a tapered section 213. The diameter of the straight section 212 is the same as the diameter of the hot runner 12, and the diameter of the tapered section 213 gradually decreases from the size same as the diameter of the straight section 212 to the size same as the diameter of the discharging port of the nozzle body 21 along the material flow direction. Through this technical solution, the pressure of the material can be increased, so that the material can be ejected from the discharging port of the nozzle body 21 with sufficient pressure.

[0034] As Figure 2As shown, in some preferred embodiments, each discharge port of the above-mentioned nozzle body 21 has a plurality of outflow channels 23, and the plurality of outflow channels 23 are evenly distributed. By evenly arranging the plurality of outflow channels 23 at the discharge port of each nozzle body 21, the material can be evenly injected into the mold, thereby ensuring the quality of the injection-molded product.

[0035] In some preferred embodiments, the outer sidewall of the above-mentioned hot nozzle body 1 is provided with a mounting groove adapted to the shape of the heating wire 3, and the heating wire 3 is located in the mounting groove. By providing a placement groove on the outer sidewall of the hot nozzle body 1 and arranging the heating wire 3 in the placement groove, not only the volume of the multi-gate hot nozzle is reduced, but also the distance between the heating wire 3 and the hot runner 12 is reduced, so that more heat generated by the heating wire 3 can be absorbed by the material in the hot runner 12, reducing heat loss.

[0036] As Figure 2 shown, in some preferred embodiments, the end face of the other end of the above-mentioned hot nozzle body 1 is provided with an annular sealing groove 14, and the annular sealing groove 14 surrounds the hot nozzle inlet 11. In specific applications, a sealing ring is provided in the annular sealing groove 14. When the hot nozzle body 1 is installed at a predetermined position of the injection machine, the sealing ring can seal the gap between the hot nozzle body 1 and the injection machine to avoid material leakage.

[0037] In some preferred embodiments, the outer sidewall of the other end of the above-mentioned hot nozzle body 1 is provided with a mounting seat 15, and a lifting hole 151 is provided on the side of the mounting seat 15 away from the nozzle 2. In specific applications, the hot nozzle body 1 can be quickly installed at a predetermined position of the injection machine through the lifting hole 151. Specifically, the lifting hole 151 can be a threaded hole.

[0038] In summary, the multi-gate hot nozzle of the present invention has a plurality of hot runners 12 provided in the hot nozzle body 1, so that the multi-turn heating wire 3 wound around the hot nozzle body 1 can simultaneously heat the materials flowing through the plurality of hot runners 12. Compared with the need for a set of heating systems for each hot runner 12, not only the production cost is reduced, but also the time required for arranging the nozzles 2 is saved during the injection molding of multi-cavity products, thereby improving the production efficiency.

[0039] The above is only the embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A multi-gate hot runner nozzle, characterized in that, Including: A hot nozzle body (1), a plurality of nozzles (2) and a heating wire (3); The hot nozzle body (1) is in the shape of a flat cuboid; a plurality of the nozzles (2) are sequentially arranged at one end of the hot nozzle body (1), a hot nozzle inlet (11) is provided at the other end of the hot nozzle body (1), and a plurality of hot runners (12) are formed in the hot nozzle body (1). One ends of the plurality of hot runners (12) are respectively communicated with the feed ports of the plurality of nozzles (2), and the other ends of the plurality of hot runners (12) are all communicated with the hot nozzle inlet (11); the heating wire (3) is wound around the hot nozzle body (1) for multiple turns.

2. The multi-gate hot nozzle according to claim 1, characterized in that, The hot nozzle body (1) has a feed section (101), a material conveying section (102) and a discharge section (103). The feed section (101), the material conveying section (102) and the discharge section (103) are all wound with multiple turns of the heating wire (3). The distance between two adjacent turns of the heating wire (3) among the multiple turns of the heating wire (3) on the feed section (101) is a first distance (a), the distance between two adjacent turns of the heating wire (3) among the multiple turns of the heating wire (3) on the discharge section (103) is a second distance (b), and the distance between two adjacent turns of the heating wire (3) among the multiple turns of the heating wire (3) on the material conveying section (102) is a third distance (c). The first distance (a) and the second distance (b) are both smaller than the third distance (c).

3. The multi-gate hot nozzle according to claim 1, characterized in that, An installation hole (13) communicated with the hot runner (12) is provided at one end of the hot nozzle body (1), and one end of the nozzle (2) extends into the installation hole (13) to be connected with the hot nozzle body (1).

4. The multi-gate hot nozzle according to claim 3, characterized in that, Each nozzle (2) includes a nozzle body (21) and a fixing sleeve (22); one end of the nozzle body (21) extends into the installation hole (13) and abuts against the bottom of the installation hole (13) so that the feed port of the nozzle body (21) is communicated with the hot runner (12); a fixing seat (211) is provided on the outer side wall of one end of the nozzle body (21), the fixing sleeve (22) is sleeved on the other end of the nozzle body (21), one end of the fixing sleeve (22) abuts against one end of the fixing seat (211) away from the bottom of the installation hole (13), and the outer side wall of the fixing sleeve (22) is connected with the side wall of the installation hole (13).

5. The multi-gate hot nozzle according to claim 4, wherein The feed port of the nozzle body (21) includes a straight section (212) and a tapered section (213). The diameter of the straight section (212) is the same as the diameter of the hot runner (12), and the diameter of the tapered section (213) gradually decreases from the size same as the diameter of the straight section (212) to the size same as the diameter of the discharge port of the nozzle body (21) along the material flow direction.

6. The multi-gate hot nozzle according to claim 4, wherein Each discharge port of the nozzle body (21) has a plurality of outflow channels (23), and the plurality of outflow channels (23) are evenly distributed.

7. The multi-gate hot nozzle according to claim 1, wherein An installation groove adapted to the shape of the heating wire (3) is provided on the outer side wall of the hot nozzle body (1), and the heating wire (3) is located in the installation groove.

8. The multi-gate hot nozzle according to claim 1, characterized in that, The end face of the other end of the hot nozzle body (1) is provided with an annular sealing groove (14), and the annular sealing groove (14) surrounds the hot nozzle inlet (11).

9. The multi-gate hot nozzle according to claim 1, characterized in that The outer side wall of the other end of the hot nozzle body (1) is provided with a mounting seat (15), and a lifting hole (151) is provided on the side of the mounting seat (15) away from the nozzle (2).

10. The multi-gate hot nozzle according to claim 1, characterized in that, The number of the hot nozzle inlets (11) is two, and each hot nozzle inlet (11) is communicated with four of the hot runners (12).

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